From the situation you've described, it appears the primary issue might stem from an incompatibility between the replacement display and the phone's original hardware. Here are the key points and steps to diagnose and potentially resolve the problem: (1) **Problem Analysis:** 1. **Display Incompatibility:** - The original display that was replaced had the model number "SM-127F," while the new display has "SM-A022F." - Samsung Galaxy models sometimes have slight variations between different batches or regions, leading to different connectors or pin configurations. Even if the parts appear similar, they might not be fully compatible. 2. **Possible Connector Issue:** - You mentioned there might be glue around the pins of the cable connector. If glue or any residue is present between the pins, it could prevent proper contact, leading to the display not functioning correctly. 3. **Potential GPU/Logic Board Damage:** - Since the phone fell, there’s also a possibility of damage to the logic board or GPU, which...